Liquid formulation containing a protein drug

A method for stabilizing a protein drug, comprising admixing a protein drug with a composition for stabilization, wherein the composition for stabilization comprises a surfactant, a buffer, and a liquid medium, and has a pH from about 5 to about 8, wherein the protein drug is an anti-c-Met antibody or antigen-binding fragment thereof comprising a CDR-H1 comprising SEQ ID NO:

• 1, a CDR-H2 comprising SEQ ID NO:
• 2, a CDR-H3 comprising SEQ ID NO:
• 3, a CDR-L1 comprising SEQ ID NO:
• 10, a CDR-L2 comprising SEQ ID NO:
• 11, and a CDR-L3 comprising SEQ ID NO:
• 13;
• and the buffer comprises succinic acid, citric acid, or a combination thereof.